| 摘要 |
A concentration of a compound in a gas is determined by a gas sensor (10) with a layer (11) comprising metal oxide. The layer (11) is heated by first heating pulses (H1) of a first duration (T1) each, and by at least one second heating pulse (H2) of a second duration (T2) between two consecutive first heating pulses (H1), which second duration (T2) is less than the first duration (T1) and is equal to or less than 5 seconds. The concentration of the gas compound is derived from values indicative of a resistance of the layer (11) as measured in response to one or more of the first and second heating pulses (H1, H2). |
